Gunman Planned Campus Shooting for at Least a Week

"There is no note or threat that I know of," NIU president John Peters told ABC News. "By all accounts that we can tell right now, [he] was a very good student that the professors thought well of."

Law enforcement authorities told ABC News' Jack Date that Kazmierczak bought two weapons Saturday — a Remington 12-gauge shotgun and 9 mm Glock pistol — at a gun store in Champaign, Ill.

From the same firearms dealer, he obtained a Hi Point 380 pistol on Dec. 30, 2007, and an SIG Sauer 9 mm pistol, on Aug. 6, 2007.

Kazmierczak had no police record, allowing him to qualify to buy the guns under the state's gun laws, sources said.

An Internet gun dealer based in Green Bay, Wis., who sold a weapon to Virginia Tech gunman Seung-Hui Cho last year, sold two empty 9 mm Glock magazines and a Glock holster to Kazmierczak, the company said in a statement.

Kazmierczak received the accessories from topglock.com, owned by TGSCOM Inc., on Tuesday, two days before the shooting. It remains unknown if the accessories were used in the shooting.

Good Student

By all accounts, Kazmierczak was a good student, serving as a member of the NIU Academic Criminal Justice Association, and a teaching aid as an undergraduate. In 2006, he received a Dean's Award from the sociology department.

Kazmierczak's father, Robert, lives in Lakeland, Fla., and his mother died in September 2006.

The shooting occurred during an introductory geology class at the university's Cole Hall, in the campus center, around 3:15 p.m. About 163 students were registered for the class.

"The assailant began firing into the assembled class from the stage — from the front," Peters said.

"It didn't seem like he was aiming. He just raised a gun and shot immediately," said Paul Sundstrom, a student who was sitting in the class with his brother Kevin when the gunman opened fire.

Kevin Sundstrom said, "He had [a] blank stare on his face, not a frown, not a grin, like there was nobody there. I went back to find Paul. He was reloading his gun, like he's in the backyard, methodically going about it."

"I didn't think it was real, I went to [the] ground, asked a girl if it was for real. She said 'run!' I crawled and never looked back," said Kristina Balluff, another student, who was also in the hall.

"If he had [a] different gun, it would have been worse," said Kevin.

Peters described the incident as a "very brief rapid-fire assault that ended with the gunman taking his own life."

An eyewitness told ABC News' Eileen Murphy that the shooter was a white male, about 5 feet, 9 inches, wearing a black beanie and a black coat, who had an ebony shotgun. He came in through the teacher's podium area and opened fire on 100 to 120 people who were attending the class.

Grady said it appeared the gunman had acted alone.

Most of the victims were taken to Kishwaukee Community Hospital in DeKalb, though some were airlifted elsewhere, including a female with a chest injury, and two other victims with head injuries.

All of the casualties were students, including the teaching assistant, leading the class, who was a graduate student, Peters said.

Today, DeKalb County coroner Dennis J. Miller released the identities of the four victims who died in his county: Daniel Parmenter, 20, of Westchester; Catalina Garcia, 20, of Cicero; Ryanne Mace, 19, of Carpentersville; and Julianna Gehant, 32, of Meridan.